powelmac Member 32 Member For: 8y 7m 4d Posted 03/02/19 07:31 AM Share Posted 03/02/19 07:31 AM Had my car at the tuner through the week. It had lightweight koya 18’s with 285/35r18 semi slicks on the back when it went on the dyno. It made 370rwkw on the mainline dyno, which the tuner thought was way down. So we chucked on some 19” FPV twists on with a cheaper, harder compound 245/35r19 tyre. It then put out 401rwkw with no changes to the tune what so ever! The koya wheel/tyre combo weighs 6kg less than the stock FPV twists, just shows how much a soft tyre can distort dyno results FYI, car ended up at 420rwkw at 19psi while I run in the new twin plate ceramic 1 Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,951 Member For: 16y 7m 7d Gender: Male Location: Melbourne Posted 03/02/19 07:32 AM Share Posted 03/02/19 07:32 AM yep, dyno results do vary based on tyres size. Link to comment Share on other sites More sharing options...
powelmac Member 32 Member For: 8y 7m 4d Posted 03/02/19 07:33 AM Author Share Posted 03/02/19 07:33 AM I knew it did, but 30rwkw is a more than I though Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,951 Member For: 16y 7m 7d Gender: Male Location: Melbourne Posted 03/02/19 07:34 AM Share Posted 03/02/19 07:34 AM yeah, possibly other minor factors added up... Link to comment Share on other sites More sharing options...
Rab WOT? Moderating Team 10,981 Member For: 11y 8m 23d Gender: Male Location: Frankston, 3199 Posted 03/02/19 08:06 AM Share Posted 03/02/19 08:06 AM Weren't the Nitto Innvo's notorious for being hard to get proper dyno reading with? Link to comment Share on other sites More sharing options...
bossmang FREAKY Donating Members 12,420 Member For: 14y 10m 23d Gender: Male Location: Melbourne Posted 04/02/19 08:24 AM Share Posted 04/02/19 08:24 AM Diameter was the issue causing different figures never heard of this before. maybe hes just stroking ya big fella hahahaahh Link to comment Share on other sites More sharing options...
camo86T Silver Donating Members 1,810 Member For: 10y 9m 5d Gender: Male Location: SW Sydney Posted 05/02/19 02:16 AM Share Posted 05/02/19 02:16 AM I thought it was common knowledge a soft semi* gave lower dyno readings, read a number on instances of this on here *@Puffwagon do the honours pls iirc monsta torque or xft used to keep a set of hard cheap arse tyres for optimal results efficiency before they got hub dynos Link to comment Share on other sites More sharing options...
Puffwagon Puff Gold Donating Members 15,860 Member For: 9y 9m 19d Gender: Male Location: South Australia Posted 05/02/19 02:19 AM Share Posted 05/02/19 02:19 AM I knew playing footy in high school would pay off cos I'ma handball this one straight to @JETURBO Link to comment Share on other sites More sharing options...
camo86T Silver Donating Members 1,810 Member For: 10y 9m 5d Gender: Male Location: SW Sydney Posted 05/02/19 02:33 AM Share Posted 05/02/19 02:33 AM Awww I meant for a soft semi pun....colour me disappointed Link to comment Share on other sites More sharing options...
Puffwagon Puff Gold Donating Members 15,860 Member For: 9y 9m 19d Gender: Male Location: South Australia Posted 05/02/19 02:35 AM Share Posted 05/02/19 02:35 AM Oh I see. Wait until later after I have a glass of port. I'll be semi soft all night long. Link to comment Share on other sites More sharing options...
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